Top 25 Gastroenterologists Across the US
Verified from CMS provider data, updated monthly. Click any provider to see credentials, insurance acceptance, and patient resources.
At a Glance
Overview
A gastroenterologist is a medical doctor who focuses on the digestive tract. That covers your esophagus, stomach, small and large intestine, liver, gallbladder, and pancreas. People see a GI doctor for ongoing heartburn, belly pain, trouble swallowing, diarrhea or constipation that will not quit, blood in the stool, and unexplained weight loss. They also manage long-term conditions like acid reflux, Crohn's disease, ulcerative colitis, irritable bowel syndrome, celiac disease, and hepatitis.
What sets a GI doctor apart is the procedures they perform. They are trained to do colonoscopy and upper endoscopy, where a thin camera looks inside your gut. These tests find the source of bleeding, remove polyps before they turn into cancer, and take small tissue samples. Most colon cancer screening starts here.
A GI doctor is different from your primary care doctor, who handles general health and refers you when symptoms need a closer look. They are also different from a colorectal surgeon, who does surgery. Your gastroenterologist diagnoses, runs tests, and starts with medicine and lifestyle changes before an operation is ever on the table. We list 21,296 gastroenterologists across the country, so you can find one who takes your insurance and works near home.
How to prepare for your first visit
A little prep makes your appointment go further. Before you go, jot down your main symptoms, when they started, and what makes them better or worse. Note any foods that trigger trouble and how often you have flare-ups. Bring a current list of your medicines and supplements, since some affect your gut or interfere with tests.
If you have had past scans, lab work, or a colonoscopy elsewhere, ask that those records be sent ahead or carry copies with you. Family history matters too, so know if a close relative had colon cancer, inflammatory bowel disease, or celiac disease.
Write down your questions so you do not forget them in the moment. Ask what your symptoms might mean, whether you need a test, and what the next step is. If you have not yet found a doctor, you can find a gastroenterologist near you and check who takes your plan first.
What happens at your appointment
Your first visit is mostly a conversation. The doctor asks about your symptoms, your medical history, and your daily habits, including diet, alcohol, and stress. They will do a physical exam and may press on your belly to check for tender spots. This helps them narrow down what is going on.
From there, they decide if you need testing. Common next steps include blood work, a stool test, an ultrasound, or a scope like a colonoscopy or upper endoscopy. Many of these are scheduled for another day, since they need prep.
If a procedure is recommended, the office will explain how to get ready and what to expect. To understand what a colonoscopy involves and how to prep, read the full guide before your test date. You leave the visit with a plan, whether that is a test, a medicine to try, or a follow-up to see how you respond.
Common Gastroenterologists Procedures
What each one involves, what it costs, and how to find a doctor near you
Gastroenterologists Treatments & Therapies
Ongoing treatments and therapies, what they involve, and how to find a provider
Gastroenterologists Tests & Diagnostics
Diagnostic tests and screenings, what they check, and how to prepare
Conditions Gastroenterologists Treat
Common concerns these providers help with. Tap one to learn about symptoms, treatment, and specialists.
Find Gastroenterologists by City
Browse gastroenterologists in top cities across the United States
Frequently Asked Questions
Common questions about gastroenterologists
What does a gastroenterologist do?
A gastroenterologist diagnoses and treats problems with the digestive system, including the stomach, intestines, liver, and pancreas. They manage conditions like acid reflux, IBS, and inflammatory bowel disease, and they perform tests such as colonoscopy and endoscopy.
When should I see a GI doctor instead of my primary care doctor?
Start with your primary care doctor for general digestive complaints. See a gastroenterologist when symptoms are ongoing or serious, such as blood in the stool, trouble swallowing, unexplained weight loss, or when you need a colonoscopy. Your primary care doctor can refer you.
Do I need a referral to see a gastroenterologist?
It depends on your insurance plan. Many PPO plans let you book directly, while HMO and some Medicare Advantage plans require a referral from your primary care doctor first. Check with your plan before you schedule.
At what age should I get a colonoscopy?
Most adults at average risk should start colon cancer screening at age 45. If you have a family history of colon cancer or certain conditions, your doctor may suggest starting earlier. A gastroenterologist can tell you what fits your situation.
Does insurance cover a gastroenterologist?
Most plans, including Medicare and Medicaid, cover visits to a gastroenterologist. Routine colon cancer screening is often covered with no out-of-pocket cost. Coverage for other tests varies, so confirm with your plan before your appointment.
What symptoms should not wait?
Get care quickly for heavy rectal bleeding, severe belly pain, vomiting blood, or black, tarry stools. These can mean something serious is happening. If symptoms feel like an emergency, call 911 or go to the nearest emergency room.
Medical disclaimer: This content is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. If you have a medical emergency, call 911. Our editorial standards